synthetically generate port add/delete on policy change

when we attempt to change the slicer for a proxy figure out which
interfaces (currently on the switch) need to be either added or removed
and generate the port status message for them
had a logic problem with the port add case
Merge branch 'ISSUE=8762-synethetically-generate-port-add/remove-on-policy-change' into 1.0.2-dev